As I said in an earlier post I installed my K&N CAI , don't know what other guys get with improved mpg but I have to say mine has improved big time. I was getting around any where from 11 to 12 mpg around town and believe me where I live stop signs and red lights everywhere. But now I'm getting 14 to 15 mpg's , that factory airbox was a killer on mileage. Can't wait to get down to TN where my wife has a house in the country where you have open roads and very little stoppage.